The Co-Operative Party does not field its own political candidates but 38 Labour MPs were elected on a joint ticket with the party.

Corbyn also hit out at Donald Trump and North Korean dictator Kim Jong-Un, accusing both of them of “macho posturing” in the war of words between the two countries over North Korea’s nuclear ambitions.

He said: “We live in a world riven by conflict, spurred on by ego and neo-imperial ambition.

“Never has the time been more important to restate our commitment to the UN Charter, the third clause of which states its aim ‘to achieve international co-operation in solving international problems’.